welder vs artificer

welder and artificer both are nouns.

Word	Noun	Adjective	Verb	Adverb
welder	Yes	No	No	No
artificer	Yes	No	No	No

As nouns, artificer is a hypernym of welder; that is, artificer is a word with a broader meaning than welder:

Other hypernyms of welder include artisan, craftsman, journeyman.

welder (noun)	artificer (noun)
joins pieces of metal by welding them together	a skilled worker who practices some trade or handicraft
	someone who is the first to think of or make something
	an enlisted man responsible for the upkeep of small arms and machine guns etc.